Hello Teddtlove!
…just reading your post here, and can see that you have some real concerns. I don't blame you, but I do know that worrying is not real healthy and won't change a thing at this point. I had a massive heart attack at 46yrs of age, and had the same concerns at that time. I'm not sure what they do for poor circulation, but it's a possibility I suppose that it could be treated with meds, or they can do bypasses as needed depending on how bad it would be.
Also, a good program to help you loose some of the weight may have a huge impact on your future health.
Take one day at a time, and lets see what the scans show.
SE